Spencer John Mares, AGACNP-BC, FNP-C
- Medicare patients, 2024
- 251
- Hospital affiliations
- 1
- Medical groups
- 3
- State licenses
- 2
- Year NPI issued
- 2018
- Practice address
- 1011 Bowles Ave, Fenton, MO 63026
- Professional email
- Get professional email
- Personal email
- Get personal email
- Mobile number
- Get mobile number
Primary practice
SSM Cancer Care South Schc - HOPD
Acute Care Hospital outpatient department · Fenton, Missouri
Find Spencer Mares' professional email, personal email and mobile number
Dmand AI checks each channel through healthcare-specific waterfall enrichment. See what is on file with a free account, with practice phones, licenses and affiliations.
Spencer John Mares is an acute care nurse practitioner in Fenton, Missouri
Spencer Mares practices at SSM Cancer Care South Schc - HOPD in Fenton, Missouri.
Spencer Mares' NPI, 1437667490, was assigned on January 11, 2018. Spencer Mares holds Missouri license 2023006109.
- NPI
- 1437667490NPI Registry (opens in a new tab)
- Medicare PAC ID
- 3072872811
- NPI enumeration date
- January 11, 2018
- NPI status
- Active
- Accepts Medicare assignment
- Yes
- Professional email
- Get email
- Personal email
- Get email
- Mobile number
- Get number
- Sex
- Male
- Estimated age
- 35
- Medical school graduation
- 2017
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; Dmand AI Affiliation Data; and Doctors and Clinicians National Downloadable File (CMS)
Spencer John Mares practices at SSM Cancer Care South Schc - HOPD in Fenton, Missouri
Spencer Mares' primary practice is SSM Cancer Care South Schc - HOPD, at 1011 Bowles Ave, Fenton, MO 63026.
- SSM Cancer Care South Schc - HOPD1011 Bowles Ave, Fenton, MO 63026
Source: Dmand AI Affiliation Data
Spencer John Mares is affiliated with 3 sites of care and 3 medical groups
Spencer Mares' primary practice is SSM Cancer Care South Schc - HOPD in Fenton, Missouri. Spencer Mares is also affiliated with SSM Health St. Joseph Hospital - Lake Saint Louis. The medical group on file is SSM Health Medical Group. Dmand AI also links Spencer Mares to 2 more medical groups and 1 group practice or clinic, each named with a free account. Spencer Mares' employer is on file too: a hospital.
Source: Dmand AI Affiliation Data
Dmand AI tracks the EHR system at Spencer John Mares' practice
Dmand AI tracks the electronic health record (EHR) system at each site where Spencer Mares practices, 3 sites in all. Vendor and product names are available with a free account.
| Site | EHR vendor and product |
|---|---|
| SSM Cancer Care South Schc - HOPD | Available with a free account |
| +2 more sites and 2 medical groups | Available with a free account |
Source: Dmand AI Technology Install Data
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Spencer John Mares is one of 349 acute care nurse practitioners in Missouri
Acute care is Spencer Mares' primary specialty in the NPI Registry, under taxonomy code 363LA2100X. Dmand AI has Spencer Mares' licenses on file in 2 states: Missouri and Illinois.
Specialties and state licenses
- Acute care nurse practitioner, MissouriPrimary
- Illinois license
Acute care nurse practitioners near Spencer Mares
Counts of acute care nurse practitioners with a Dmand AI profile, by place and practice. Each opens the list.
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; and Dmand AI Peer Benchmarks
Spencer John Mares treated 251 Medicare patients in 2024, average age 77
CMS counts 251 Medicare patients who saw Spencer Mares in 2024. The largest group is 75 to 84, with 86 patients. 75% of them have high blood pressure, and 75% have high cholesterol. 13% are also on Medicaid. Their average risk score is 2.58, where 1.00 is the Medicare average, so they are sicker than most Medicare patients.
Across all payers, Dmand AI patient panel data puts Spencer Mares' median patient age at 75, with 50% women.
Spencer Mares' Medicare patients by age, 2024
Spencer Mares' Medicare patients by sex, 2024
- Women13052%
- Men12148%
Chronic conditions among Spencer Mares' Medicare patients, 2024
- High blood pressure75%
- High cholesterol75%
- Chronic kidney disease60%
- Heart failure59%
- Arthritis55%
- Ischemic heart disease53%
- Anxiety48%
- Mood disorders48%
Share of Medicare patients with each condition. A patient can have several.
Spencer Mares' patients across all payers
Dmand AI patient panel data covers Medicare, Medicaid and commercial patients.
Patient panel by age, all payers
Median age 75
Patient panel by sex, all payers
- Women50%
- Men50%
Sources: Dmand AI Patient Panel Data; and Medicare Physician & Other Practitioners - by Provider (CMS), 2024 data
How Spencer John Mares takes part in Medicare
Spencer Mares accepts Medicare assignment, so Medicare's approved amount is taken as full payment.
- Accepts Medicare assignment
- Yes
Source: Doctors and Clinicians National Downloadable File (CMS)
Sources for Spencer John Mares's profile data
| Data on this page | Source |
|---|---|
| NPI, name, sex, specialty and licenses | NPPES NPI Registry (CMS) (opens in a new tab)Dmand AI Professional Profile Data |
| Practice locations and phone | Dmand AI Affiliation Data |
| Primary practice, affiliations and health system | Dmand AI Affiliation Data |
| Medicare patients and the all-payer patient panel | Dmand AI Patient Panel DataMedicare Physician & Other Practitioners - by Provider (CMS) (opens in a new tab) |
| MIPS scores, telehealth, assignment and procedure percentiles | Doctors and Clinicians National Downloadable File (CMS) (opens in a new tab) |
| EHR at each practice site | Dmand AI Technology Install Data |
| Similar physicians | Dmand AI Affiliation Data |
Data last refreshed October 2026Report an inaccuracyRemove my information
FAQ
Frequently asked questions about Spencer John Mares
Spotted something out of date? Email hello@dmand.ai and we will check the record. Contact details live in the free trial.
What is Spencer John Mares' NPI number?
Spencer John Mares' NPI number is 1437667490. It was assigned on January 11, 2018, and it is active in the NPI Registry.
What does Spencer John Mares specialize in?
Spencer John Mares is an acute care nurse practitioner in Fenton, Missouri. The primary specialty in the NPI Registry is Acute Care Nurse Practitioner (taxonomy code 363LA2100X).
Where does Spencer John Mares practice?
Spencer Mares practices at 1011 Bowles Ave, Fenton, MO 63026. Spencer Mares' primary practice is SSM Cancer Care South Schc - HOPD in Fenton, Missouri. Dmand AI also links Spencer Mares to 2 medical groups and 1 group practice or clinic.
What is Spencer John Mares' medical license number?
Spencer Mares holds Missouri license 2023006109, one of the licenses on file in 2 states.
Which states has Spencer John Mares been licensed in?
Dmand AI has state licenses on file for Spencer Mares in Missouri and Illinois.
Which hospitals is Spencer John Mares affiliated with?
Spencer Mares is affiliated with SSM Health St. Joseph Hospital - Lake Saint Louis.
What medical group is Spencer John Mares part of?
Spencer Mares is linked to SSM Health Medical Group. Dmand AI links Spencer Mares to 2 more medical groups.
Does Spencer John Mares accept Medicare?
Yes. CMS lists Spencer Mares as accepting Medicare assignment.
How many Medicare patients does Spencer John Mares see?
CMS counts 251 Medicare patients who saw Spencer Mares in 2024, with an average age of 77.
How long has Spencer John Mares been practicing?
Spencer Mares graduated from medical school in 2017, 9 years ago.
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